/*
 * Copyright (c) 2007, 2015, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
/*
 * Copyright 1999-2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
 * $Id: XNodeSetForDOM.java,v 1.2.4.1 2005/09/14 20:34:46 jeffsuttor Exp $
 */
package com.sun.org.apache.xpath.internal.objects;

import com.sun.org.apache.xml.internal.dtm.DTMManager;
import com.sun.org.apache.xpath.internal.NodeSetDTM;
import com.sun.org.apache.xpath.internal.XPathContext;

import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.traversal.NodeIterator;

/**
 * This class overrides the XNodeSet#object() method to provide the original
 * Node object, NodeList object, or NodeIterator.
 */
public class XNodeSetForDOM extends XNodeSet {

  static final long serialVersionUID = -8396190713754624640L;
  Object m_origObj;

  public XNodeSetForDOM(Node node, DTMManager dtmMgr) {
    m_dtmMgr = dtmMgr;
    m_origObj = node;
    int dtmHandle = dtmMgr.getDTMHandleFromNode(node);
    setObject(new NodeSetDTM(dtmMgr));
    ((NodeSetDTM) m_obj).addNode(dtmHandle);
  }

  /**
   * Construct a XNodeSet object.
   *
   * @param val Value of the XNodeSet object
   */
  public XNodeSetForDOM(XNodeSet val) {
    super(val);
    if (val instanceof XNodeSetForDOM) {
      m_origObj = ((XNodeSetForDOM) val).m_origObj;
    }
  }

  public XNodeSetForDOM(NodeList nodeList, XPathContext xctxt) {
    m_dtmMgr = xctxt.getDTMManager();
    m_origObj = nodeList;

    // JKESS 20020514: Longer-term solution is to force
    // folks to request length through an accessor, so we can defer this
    // retrieval... but that requires an API change.
    // m_obj=new com.sun.org.apache.xpath.internal.NodeSetDTM(nodeList, xctxt);
    com.sun.org.apache.xpath.internal.NodeSetDTM nsdtm = new com.sun.org.apache.xpath.internal.NodeSetDTM(
        nodeList, xctxt);
    m_last = nsdtm.getLength();
    setObject(nsdtm);
  }

  public XNodeSetForDOM(NodeIterator nodeIter, XPathContext xctxt) {
    m_dtmMgr = xctxt.getDTMManager();
    m_origObj = nodeIter;

    // JKESS 20020514: Longer-term solution is to force
    // folks to request length through an accessor, so we can defer this
    // retrieval... but that requires an API change.
    // m_obj = new com.sun.org.apache.xpath.internal.NodeSetDTM(nodeIter, xctxt);
    com.sun.org.apache.xpath.internal.NodeSetDTM nsdtm = new com.sun.org.apache.xpath.internal.NodeSetDTM(
        nodeIter, xctxt);
    m_last = nsdtm.getLength();
    setObject(nsdtm);
  }

  /**
   * Return the original DOM object that the user passed in.  For use primarily
   * by the extension mechanism.
   *
   * @return The object that this class wraps
   */
  public Object object() {
    return m_origObj;
  }

  /**
   * Cast result object to a nodelist. Always issues an error.
   *
   * @return null
   */
  public NodeIterator nodeset() throws javax.xml.transform.TransformerException {
    return (m_origObj instanceof NodeIterator)
        ? (NodeIterator) m_origObj : super.nodeset();
  }

  /**
   * Cast result object to a nodelist. Always issues an error.
   *
   * @return null
   */
  public NodeList nodelist() throws javax.xml.transform.TransformerException {
    return (m_origObj instanceof NodeList)
        ? (NodeList) m_origObj : super.nodelist();
  }


}
